Motor thrust and screw rod precision detection device

Abstract

The utility model relates to the technical field of stepping motors, in particular to a motor thrust and lead screw precision detection device. The motor thrust and lead screw precision detection device comprises a bottom plate and a motor with a lead screw as an output part, a linear sliding rail assembly is arranged in the middle of the bottom plate in the length direction of the bottom plate, a grating ruler assembly is arranged on one side of the linear sliding rail assembly, and a motor mounting plate for supporting the motor is connected to one end of the linear sliding rail assembly. A rapid clamping assembly is arranged at the end, close to the motor mounting plate, of the bottom plate and comprises an air cylinder and a pressing block connected to the output end of the air cylinder, the air cylinder is located on the opposite side of the motor mounting plate, and the motor is located between the air cylinder and the motor mounting plate and pressed by the pressing block. According to the utility model, the operation process is simplified through the rapid clamping assembly and air pressure control, and the test efficiency is obviously improved; efficient, accurate and safe testing is achieved, and the method is suitable for the field of industrial production and research and development.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of step motor, concretely relates to step motor test technology, and especially to a motor thrust and screw precision detection device. BACKGROUND

[0002] Step motor is a kind of electric motor that converts electric pulse signal into corresponding angular displacement or linear displacement. Every input pulse signal, the rotor of motor rotates an angle or moves forward one step, and the output angular displacement or linear displacement is proportional to the input pulse number, and the rotation speed is proportional to the pulse frequency. Therefore, the application occasion of many step motors needs to test the positioning accuracy and repeat positioning accuracy of linear step motor first, to ensure the use efficiency of motor itself.

[0003] The patent with publication number CN213455336U discloses a precision testing device capable of testing step motor load working condition, which measures running displacement through grating, wherein the support plate is used to install screw motor, and one end of the steel wire suspending load is connected with nut and erected on pulley. The testing device directly connects load rope with nut during testing, and if the testing object needs to be replaced, not only the nut needs to be disassembled, but also the connection between load rope and nut needs to be released, which is inconvenient to operate and low in testing efficiency, especially the direct connection between load rope and nut can accelerate the loss of nut.

[0004] The patent with publication number CN117906507A discloses a linear actuator precision testing device and testing method, and the structure of quick clamping of linear motor is mentioned in the document, and elbow clamp is arranged on the bottom plate to tightly press the motor. The elbow clamp is too cumbersome to operate: as shown in Figure 1 When the handle is pressed to position, the length of push rod may not contact the motor, and the threaded part at the end of push rod needs to be screwed out to increase the length; as shown in Figure 2 When the push rod is too long to press against the motor, the handle cannot be pressed to position, and the effect of tightly pressing positioning cannot be achieved. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problems in the above background technology, that is, to provide a motor thrust and screw precision detection device, which solves the problems of inconvenient operation, nut loss, cumbersome clamping and poor positioning effect.

[0006] The utility model discloses a technical scheme that solves its technical problem is adopted: a motor thrust and screw precision detection device, including the motor of bottom plate and output part for screw rod, the middle of bottom plate is provided with linear slide rail subassembly along its length direction, one side of linear slide rail subassembly is equipped with grating ruler subassembly, is connected with the motor mounting plate of support motor at one end of linear slide rail subassembly, and the one end of bottom plate near motor mounting plate is provided with quick clamping subassembly, quick clamping subassembly includes pneumatic cylinder and the pressure block of connecting at pneumatic cylinder output, pneumatic cylinder is located the opposite side of motor mounting plate, and motor is located between pneumatic cylinder and motor mounting plate and is pressed tightly by pressure block.

[0007] The device realizes quick and accurate detection of motor thrust and screw precision through quick clamping subassembly, grating ruler subassembly, linear slide rail subassembly and pulley assembly, integrates functions of air pressure control, high-precision displacement measurement, load transmission and motor fixing, and can efficiently complete test tasks. The device drives the pressure block through the pneumatic cylinder, quickly presses the motor, realizes quick fixing of the motor, simplifies clamping operation, improves test efficiency, reduces manual intervention, and avoids cumbersome adjustment problems of traditional clamping modes (such as elbow clamps).

[0008] According to one embodiment of the utility model, the quick clamping subassembly further includes a reversing valve and an air pressure gauge, the air inlet of the reversing valve is connected with the air source through an air pipe, the air pressure gauge is installed on the air pipe, and the two working ports of the reversing valve are respectively connected with the two air ports of the pneumatic cylinder.

[0009] The reversing valve controls the movement direction of the pneumatic cylinder, the air pressure gauge monitors the air pressure value, realizes accurate control of the pneumatic cylinder, ensures stable pressing force, and simultaneously realizes real-time monitoring of the air pressure by the air pressure gauge, ensuring safety and reliability of the test process.

[0010] According to one embodiment of the utility model,

[0011] The screw rod of the motor is provided with a screw rod nut;

[0012] The linear slide rail subassembly includes a linear slide rail and a sliding block sliding along the linear slide rail, the upper surface of the sliding block is connected with a nut fixing plate, the screw rod nut is connected with the nut fixing plate through a screw, and one end of the nut fixing plate is connected with a load rope.

[0013] The screw rod nut cooperates with the motor screw rod, and the linear slide rail subassembly (the slide rail and the sliding block) realizes linear movement of the load; the stability and precision of the load movement are ensured, friction loss is reduced, and the accuracy of the test result is improved.

[0014] According to one embodiment of the utility model, the longitudinal section of the nut fixing plate is L-shaped, including a vertical part and a horizontal part, the horizontal part is connected with the sliding block, and a U-shaped notch for placing the screw rod nut is formed in the middle of the top of the vertical part.

[0015] The nut fixing plate fixes the screw nut, ensures accurate positioning of the nut through the U-shaped gap, simplifies the installation of the nut, improves the structural stability, reduces the wear of the nut, and prolongs the service life of the device.

[0016] According to one embodiment of the present application, the grating ruler assembly comprises a grating ruler and a reading head slidingly arranged on the grating ruler, and the reading head is connected with the nut fixing plate.

[0017] The displacement of the load is measured by the grating ruler and the reading head, high-precision displacement measurement data is provided, and the accuracy of the test results is ensured.

[0018] According to one embodiment of the present application, a digital display instrument is further arranged on the bottom plate, the digital display instrument is connected to the instrument fixing rod, and the digital display instrument is connected to the reading head through a data line.

[0019] The digital display instrument is used to display the measurement data of the grating ruler reading head, real-time display test data, facilitate observation and recording by the operator, and improve the test efficiency.

[0020] According to one embodiment of the present application, a pulley assembly is installed at one end of the bottom plate away from the quick clamping assembly, the pulley assembly is composed of a pulley positioning block and a pulley movably installed on the pulley positioning block, and the pulley positioning block is connected to the bottom plate.

[0021] The direction of the load rope is changed by the pulley, the weight disc is connected, the stable transmission of the load is realized, the friction loss of the load rope is reduced, and the size of the load is conveniently adjusted.

[0022] According to one embodiment of the present application, a limit block is arranged at one end of the linear sliding rail assembly away from the motor mounting plate, a through hole through which the load rope passes is arranged on the limit block, and the load rope passes through the through hole and the pulley in sequence from one end of the nut fixing plate along the sliding rail and is connected with the weight disc.

[0023] The limit block limits the movement range of the sliding block, prevents the sliding block from disengaging from the sliding rail, improves the safety of the test process, and avoids test interruption or equipment damage caused by disengagement of the sliding block.

[0024] According to one embodiment of the present application, a stop opening is formed in the motor mounting plate, and the stop opening cooperates with the flange portion of the motor.

[0025] The stop opening on the motor mounting plate cooperates with the flange portion of the motor, realizes accurate positioning of the motor, ensures the accuracy and stability of the motor installation, and reduces the influence of installation errors on the test results.

[0026] According to one embodiment of the present application,

[0027] The air cylinder is mounted on a cylinder fixing plate, and the cylinder fixing plate is fixed on the base plate.

[0028] The material of the pressing block is plastic or rubber.

[0029] The cylinder fixing plate improves the stability of the air cylinder installation, and the plastic or rubber pressing block avoids damaging the surface of the motor while providing sufficient pressing force.

[0030] The utility model discloses the beneficial effects of:

[0031] (1) the quick clamping assembly and the air pressure control of the utility model simplify the operation process, and the test efficiency is improved significantly.

[0032] (2) the grating ruler assembly and the digital display instrument of the utility model ensure the high precision of displacement measurement, and the test result is reliable.

[0033] (3) the linear slide rail, the nut fixing plate and the stop mouth design of the utility model ensure the stability and durability of the device.

[0034] (4) the limiting block and the pulley assembly of the utility model improve the safety of the test process, and accidents are avoided.

[0035] (5) the test device of the utility model can be adapted to different models of motors and screws, and has strong universality.

[0036] (6) the test device of the utility model realizes efficient, accurate and safe test, and is suitable for industrial production and research and development fields. BRIEF DESCRIPTION OF DRAWINGS

[0037] The utility model will be further described below in combination with the drawings and examples.

[0038] Figure 1 It is the structure schematic diagram of the existing technology when the push rod is not enough when the elbow clamp is clamped and the motor is pushed.

[0039] Figure 2 It is the structure schematic diagram of the existing technology when the push rod is too long when the elbow clamp is clamped and the motor is pushed.

[0040] Figure 3 It is the structure schematic diagram of the utility model.

[0041] Figure 4 It is Figure 3 The structure schematic diagram in another direction.

[0042] Figure 5 It is Figure 3 The structure schematic diagram of the utility model is removed motor, load rope and scale disc.

[0043] In the figure: 1, the base plate; 2, the screw rod; 3, the motor; 4, the motor mounting plate; 41, the stop opening; 5, the air cylinder; 6, the pressing block; 7, the air cylinder fixing plate; 8, the linear slide rail; 9, the sliding block; 10, the nut fixing plate; 101, the vertical part; 102, the horizontal part; 1011, the U-shaped notch; 11, the load rope; 12, the pulley positioning block; 13, the pulley; 14, the limit block; 141, the through hole; 15, the weighing pan; 16, the reversing valve; 17, the air pressure gauge; 18, the grating ruler; 19, the reading head; 20, the digital display instrument; 21, the instrument fixing rod; 22, the screw rod nut. DETAILED DESCRIPTION

[0044] The utility model will be explained further in detail now in combination with the drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the utility model in a schematic way, so it only shows the structure related to the utility model.

[0045] As shown in Figure 3 and Figure 4 , a motor thrust and screw precision detection device, including the base plate 1 and the output part is the screw rod 2 of motor 3, the screw rod 22 is installed on the screw rod 2, the middle of base plate 1 is provided with linear slide rail assembly along its length direction, one side of linear slide rail assembly is equipped with grating ruler assembly, the motor mounting plate 4 of supporting motor 3 is connected in one end of linear slide rail assembly, the one end of base plate 1 close to motor mounting plate 4 is provided with quick clamping assembly;The pulley assembly is installed in the one end of base plate 1 away from quick clamping assembly, and the pulley assembly is composed of pulley positioning block 12 and pulley 13 movably installed on pulley positioning block 12, and pulley positioning block 12 is connected on base plate 1.

[0046] As shown in Figure 5 , linear slide rail assembly includes linear slide rail 8 and sliding block 9 along its sliding, the upper surface of sliding block 9 is connected with nut fixing plate 10, screw rod nut 22 is connected with nut fixing plate 10 through screw, and one end of nut fixing plate 10 is connected with load rope 11. The one end of linear slide rail assembly away from motor mounting plate 4 is provided with limit block 14, and the through hole 141 through by load rope 11 is arranged on limit block 14, and load rope 11 is connected with weighing pan 15 after passing through through hole 141, pulley 13 along linear slide rail 8 from one end of nut fixing plate 10.

[0047] Through screw rod nut 22, linear slide rail assembly and pulley assembly, the stable transmission and linear motion of load are realized, screw rod nut 22 cooperates with linear slide rail assembly, and the stability and precision of load movement are ensured;The direction of pulley assembly changes load rope 11, connects weighing pan 15, and it is convenient to adjust the size of load. Limit block 14 limits the movement range of sliding block 9, prevents sliding block 9 from separating from linear slide rail 8, and improves safety.

[0048] Furthermore, the longitudinal section of the nut fixing plate 10 is L-shaped, including a vertical part 101 and a horizontal part 102. The horizontal part 102 is connected to the slider 9, and a U-shaped notch 1011 for placing the lead screw nut 22 is opened in the middle of the top of the vertical part 101.

[0049] The quick-clamping assembly includes a cylinder 5, a pressure block 6 connected to the output end of the cylinder 5, a reversing valve 16, and a pressure gauge 17. The cylinder 5 is located on the opposite side of the motor mounting plate 4, and the motor 3 is located between the cylinder 5 and the motor mounting plate 4 and is pressed by the pressure block 6. The motor mounting plate 4 has a stop 41, which mates with the flange of the motor 3. The cylinder 5 is mounted on a cylinder fixing plate 7, which is fixed to the base plate 1. The pressure block 6 is made of plastic or rubber. The air inlet of the reversing valve 16 is connected to an air source through an air pipe, and a pressure gauge 17 is installed on the air pipe. The two working ports of the reversing valve 16 are respectively connected to the two air ports of the cylinder 5. The cylinder 5 is suitable for motors 3 of various axial lengths, as long as the piston limit of the cylinder 5 is selected to clamp the motor 3 with the shortest axial length.

[0050] The pressure block 6, driven by cylinder 5, and the stop 41 on the motor mounting plate 4 quickly clamp and fix the motor 3, simplifying the clamping operation of the motor 3, significantly improving testing efficiency, and is suitable for motors 3 with different axial lengths, demonstrating strong versatility. The pressure block 6 is made of plastic or rubber to avoid damage to the surface of the motor 3. The movement of cylinder 5 is controlled by reversing valve 16 and pressure gauge 17 to ensure the stability of the clamping force. Reversing valve 16 enables precise control of cylinder 5, and pressure gauge 17 monitors the air pressure value in real time, ensuring the safety and reliability of the testing process. Cylinder fixing plate 7 improves the stability of cylinder 5 and ensures uniform distribution of clamping force. The overall structural design is reasonable, reducing component wear and extending the service life of the device.

[0051] The grating ruler assembly includes a grating ruler 18 and a reading head 19 slidably mounted on the grating ruler 18. The reading head 19 is connected to the nut fixing plate 10. A digital display instrument 20 is also mounted on the base plate 1. The digital display instrument 20 is connected to the instrument fixing rod 21 and is connected to the reading head 19 via a data cable.

[0052] The load displacement is measured in real time using the grating ruler assembly and digital display instrument 20. The grating ruler 18 and reading head 19 provide high-precision displacement measurement data, ensuring the accuracy of the test results. The digital display instrument 20 displays the measurement data in real time, facilitating observation and recording by the operator.

[0053] As a specific example:

[0054] The bottom plate 1 uses 45# steel material and is blackened, mainly for assembling linear slide rail assembly, grating ruler assembly and other components, which is the main bearing of the device; the air pressure gauge 17 is model ARX20, fixed on the bottom plate 1 by screws, used for connecting the air path and adjusting the air pressure; the air cylinder 5 is model SDA25*40, one end of which is fixed on the air cylinder fixing plate 7 by screws, and the output end is used for assembling the pressing block 6; the air cylinder fixing plate 7 uses 45# steel material and is blackened, fixed on the bottom plate 1 by screws, used for assembling the air cylinder 5; the reversing valve 16 is model MSHBA1, fixed on the bottom plate 1 by screws, connected with the air path, and the reversing valve 16 can be pulled to adjust the extension and retraction action of the air cylinder 5; the pressing block 6 is made of PU, fixed on the output end of the air cylinder 5 by screws, used for clamping the measured motor 3 when the air cylinder 5 extends; the motor mounting plate 4 uses 45# steel material and is blackened, fixed on the bottom plate 1 by screws, used for mounting the measured motor 3; the linear slide rail assembly is model MGN12H1R550, fixed on the bottom plate 1 by screws, used for mounting the nut fixing plate 10, and can keep sliding operation during testing; the nut fixing plate 10 uses 45# steel material and is blackened, fixed on the linear slide rail assembly by screws, used for mounting the reading head 19 and the screw nut 22 on the measured motor screw rod 2; the limit block 14 uses 45# steel material and is blackened, fixed on the bottom plate 1 by screws, used for limiting the slide rail slider 9; the grating ruler 18 is model 500mm, fixed on the bottom plate 1 by screws, assembled with the reading head 19, used for real-time feedback of displacement data during testing; the reading head 19 uses 45# steel material and is blackened, fixed on the grating ruler 18 and the nut fixing plate 10 by screws, used for linkage of the two; the digital display instrument 20 is installed on the instrument fixing rod 21, used for real-time viewing of displacement data and calculation accuracy during testing; the instrument fixing rod 21 uses 40*40 aluminum profile, fixed on the bottom plate 1 by screws, used for mounting the digital display instrument 20; the pulley positioning block 12 uses 45# steel material and is blackened, fixed on the bottom plate 1 by screws, used for mounting the pulley 13; the pulley 13 is model U type 42*8*16, fixed on the pulley positioning block 12, used for bearing the load rope 11; one end of the load rope 11 is connected to the nut fixing plate 10, and the other end is connected to the weight pan 15, used for load connection; the weight pan 15 is connected to the load rope 11, used for installing load weights during testing.

[0055] Specific installation:

[0056] Firstly, according to the size and model of the measured motor 3, select appropriate motor mounting plate 4 and nut fixing plate 10, respectively install them on one end of the linear slide rail 8 and the slider 9, ensure that the measured motor 3 can be accurately installed in place, avoid unstable installation or installation failure due to size mismatch;

[0057] Then, the motor under test 3 is placed on the motor mounting plate 4, and the flange of the motor 3 corresponds to the inner circle of the stop 41 of the motor mounting plate 4. The reversing valve 16 is started, the cylinder 5 is extended, and the output end of the pressing block 6 presses the motor under test 3, so that the motor 3 is clamped by the pressing block 6 and the motor mounting plate 4, preventing the motor 3 from moving axially, ensuring the stability of the motor 3 in the axial direction; at the same time, the flange of the motor 3 cooperates with the stop 41 of the motor mounting plate 4, which can also prevent the motor 3 from moving radially, ensuring that the motor 3 will not deviate in the radial direction, thereby ensuring the overall stability of the motor 3 during testing, avoiding test errors caused by the motor 3 shaking;

[0058] Then, the screw nut 22 on the screw rod 2 is installed on the nut fixing plate 10 using a screw, one end of the load rope 11 is connected to the nut fixing plate 10, and the other end passes through the through hole 141 on the limiting block 14 and is connected to the weight disc 15 through the pulley 13;

[0059] Finally, the weight of the required load value for testing is placed on the weight disc 15, and the weight on the weight disc 15 can be selected and placed according to the required load value for testing, so as to apply an accurate load to the motor under test 3, facilitating the testing and evaluation of the performance of the motor 3 under different load conditions.

[0060] Specific working principle:

[0061] The displacement amount for testing the motor 3 is set on the motor controller, the motor 3 is started, the screw nut 22 moves linearly on the screw rod 2, the nut fixing plate 10 and the reading head 19 are moved by the screw nut 22, the actual displacement amount collected by the grating ruler 18 is fed back to the digital display instrument 20, and the difference between the actual displacement amount displayed on the digital display instrument 20 and the theoretical displacement amount set on the motor controller is the precision error. Since the grating ruler 18 and the digital display instrument 20 can collect and display displacement data in real time, the motion precision of the motor 3 can be dynamically monitored, and deviations or abnormal conditions that may occur during motion can be found in time, facilitating timely adjustment and optimization of the operating parameters of the motor 3.

[0062] Further, the motor controller can set the forward and reverse programs in advance, so that the precision error of the motor 3 after multiple forward and reverse tests can be tested. In this way, it is suitable for testing the performance and precision of the motor 3 in different running directions, and can comprehensively evaluate the dynamic characteristics of the motor 3. Through multiple forward and reverse tests, the precision error of the motor 3 under different operating conditions can be counted, so that the overall performance and reliability of the motor 3 can be more accurately evaluated; multiple tests can reduce the influence of accidental errors and provide more representative test results, providing strong support for the quality evaluation and improvement of the motor 3.

[0063] Through displacement accuracy testing and multiple forward and reverse rotation testing, the displacement control accuracy, dynamic response characteristics, operation stability, and reliability of the motor 3 can be comprehensively evaluated. This comprehensive evaluation method can more comprehensively reflect the actual working performance of the motor 3, and provide comprehensive reference for the selection, application and improvement of the motor 3. The testing principle is applicable to testing of various types of motors 3, and can be flexibly adjusted and configured according to the characteristics and testing requirements of different motors 3, and has strong adaptability and universality.

[0064] With the above ideal embodiments according to the present application as inspiration, through the above description, relevant personnel can certainly make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.

Claims

1. A device for detecting the thrust and lead screw accuracy of a motor, comprising a base plate (1) and a motor (3) with a lead screw (2) as its output part, wherein a linear slide rail assembly is provided in the middle of the base plate (1) along its length direction, and a grating ruler assembly is provided on one side of the linear slide rail assembly, characterized in that: A motor mounting plate (4) supporting a motor (3) is connected to one end of the linear slide rail assembly. A quick clamping assembly is provided at one end of the base plate (1) near the motor mounting plate (4). The quick clamping assembly includes a cylinder (5) and a pressure block (6) connected to the output end of the cylinder (5). The cylinder (5) is located on the opposite side of the motor mounting plate (4), and the motor (3) is located between the cylinder (5) and the motor mounting plate (4) and is pressed by the pressure block (6).

2. The motor thrust and lead screw accuracy detection device according to claim 1, characterized in that: The quick clamping assembly also includes a reversing valve (16) and a pressure gauge (17). The air inlet of the reversing valve (16) is connected to the air source through an air pipe. The pressure gauge (17) is installed on the air pipe. The two working ports of the reversing valve (16) are respectively connected to the two air ports of the cylinder (5).

3. The motor thrust and lead screw accuracy detection device according to claim 1, characterized in that: The lead screw of the motor (3) is equipped with a lead screw nut (22); The linear slide rail assembly includes a linear slide rail (8) and a slider (9) that slides along it. A nut fixing plate (10) is connected to the upper surface of the slider (9). The lead screw nut (22) is connected to the nut fixing plate (10) by a screw. One end of the nut fixing plate (10) is connected to a load rope (11).

4. The motor thrust and lead screw accuracy detection device according to claim 3, characterized in that: The longitudinal section of the nut fixing plate (10) is L-shaped, including a vertical part (101) and a horizontal part (102). The horizontal part (102) is connected to the slider (9). A U-shaped notch (1011) for placing the screw nut (22) is opened in the middle of the top of the vertical part (101).

5. The motor thrust and lead screw accuracy detection device according to claim 3, characterized in that: The grating ruler assembly includes a grating ruler (18) and a reading head (19) slidably disposed on the grating ruler (18), the reading head (19) being connected to a nut fixing plate (10).

6. The motor thrust and lead screw accuracy detection device according to claim 5, characterized in that: A digital display instrument (20) is also provided on the base plate (1). The digital display instrument (20) is connected to the instrument fixing rod (21) and is connected to the reading head (19) through a data cable.

7. The motor thrust and lead screw accuracy detection device according to claim 4, characterized in that: A pulley assembly is installed at the end of the base plate (1) away from the quick clamping assembly. The pulley assembly consists of a pulley positioning block (12) and a pulley (13) movably mounted on the pulley positioning block (12). The pulley positioning block (12) is connected to the base plate (1).

8. The motor thrust and lead screw accuracy detection device according to claim 7, characterized in that: The linear slide rail assembly is provided with a limit block (14) at one end away from the motor mounting plate (4). The limit block (14) is provided with a through hole (141) through which the load rope (11) passes. The load rope (11) passes through the through hole (141) and the pulley (13) along the linear slide rail (8) from one end of the nut fixing plate (10) and is then connected to the weight plate (15).

9. The motor thrust and lead screw accuracy detection device according to claim 1, characterized in that: The motor mounting plate (4) has a stop (41) which is engaged with the flange of the motor (3).

10. The motor thrust and lead screw accuracy detection device according to claim 1, characterized in that: The cylinder (5) is mounted on the cylinder fixing plate (7), and the cylinder fixing plate (7) is fixed on the base plate (1); The material of the pressure block (6) is plastic or rubber.

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